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https://issues.apache.org/jira/browse/ARROW-11642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17285095#comment-17285095
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Markus Silberstein Hont commented on ARROW-11642:
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Pull request coming (need to read up on how to contribute first ;))
> [C++] Incorrect preprocessor directive for Windows
> --------------------------------------------------
>
> Key: ARROW-11642
> URL: https://issues.apache.org/jira/browse/ARROW-11642
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Markus Silberstein Hont
> Priority: Critical
>
> In the HDFS connector library, there are per-platform preprocessor directives
> to determine which libjvm and libhdfs binaries to use for file operations.
> This is currently (3.0.0) failing due to an incorrect preprocessor directive
> for Windows. The code is referring to "__WIN32" while the properly defined
> variable should be "_WIN32" (see
> https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-160)
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